Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f99f322e743081…

MALICIOUS

PDF

72.6 KB Created: 2021-03-09 09:54:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 00b0a1e0607525f43c2d1b22ef3ae74a SHA-1: 00b275fd4cf3f30eb0ac88fac983e2437e34bfe3 SHA-256: 52f99f322e743081c275991bb8f510a6f8e66c8e5cff6912410b589fb8dee8b4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The document body, though partially obfuscated, suggests a lure related to product search terms, specifically 'how much is playstation vita', directing users to external URLs. The presence of numerous external links on disposable hosting further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jottigo.ru/aws?utm_term=how+much+is+playstation+vita PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403273/normal_6046442bdd4ac.pdfIn PDF document text
    • http://debesur.iblogger.org/76226743706.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_602b3b4fe8352.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446781/normal_5fccb13d3758c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443617/normal_5ff757fa2f9c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488133/normal_6044e7d83d607.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448343/normal_5fcb77b6e3b9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418973/normal_5fca6aed1888d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_7b88449981ab45b688e0a92e9ee8d403.pdf?index=trueIn PDF document text
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_ad6360b51f3a48c99aef90ff88522d98.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e4f3f6d-d8c6-47cd-aebb-f98282f13131/10526661711.pdfIn PDF document text
    • http://jaxojuruwak.rf.gd/yesterday_beatles_classical_guitar_sheet_music.pdfIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_a511ca44f62f4216adb5dd53187a5121.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bd61e7a-1785-4f2b-96b8-07909e15f9cc/84250516700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f82c943-12f8-42b4-962a-760eebb11d59/14750190702.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_1d1a08008a104dff8295a6b03d212d34.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc033642-566f-4085-b756-6ba9cad939f3/tojusizikabi.pdfIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_e51944ad67b046d0a52bb826590da75d.pdf?index=trueIn PDF document text
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_31b839d20c364a32a1cb940034108604.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/64fb465a-e1ee-420e-8053-1d54e73cbd33/how_to_arrange_colours.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF69 5292 bytes
SHA-256: a1bf3af3936e8616bd77cd4bdd3ab4674ad96b974f128f555521fdcdc9449ef1
font_01_sfnt_off0000f162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF162 10536 bytes
SHA-256: 7a92b1446dae3449decdab19dd25630b320f3ea37dfb2119743d3dc8ab0992b7

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